Electric transmission of energy and its transformation, subdivision, and distribution. A practical handbook
Gisbert Kapp's practical handbook on electric power transmission, distribution, and transformation, issued by Van Nostrand in New York in 1894 for engineers and electrical technicians. The line diagrams show ring armatures wrapped in hatched coil windings, field magnets marked N and S, vector angles, and stepped voltage curves, offering designers concentric circular patterns, dense hatching, and schematic labelled geometry.
